What will happen _______ people if they don"t protect the environment?[ ]A.

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What will happen _______ people if they don"t protect the environment?[     ]
A. on
B. for
C. to
D. at

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举一反三

What do you mean _____ signing the letter for him?[     ]
A. with
B. by
C. in
D. for

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Last night a prisoner escaped ________ the prison.[     ]
A. of
B. out of
C. from
D. both B and C

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Chinese is used           the first language in China.[     ]
A. for
B. as
C. by
D. to

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—What was Jimmy going to do?
—He was going to put some signs old books. A. up; to ask for
B. on; to ask to
C. up; asking to
D. down; asking for

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—          were electric slippers invented?
—Sorry. I don"t know.     [     ]
A. Who
B. Whom
C. Of whom
D. By whom

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